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![Page Visibility API]()
Page Visibility API
One event that's always been lacking within the document is a signal for when the user is looking at a given tab, or another tab. When does the user switch off our site to look at something else? When do they come back?
![How to Create a RetroPie on Raspberry Pi – Graphical Guide]()
How to Create a RetroPie on Raspberry Pi – Graphical Guide
Today we get to play amazing games on our super powered game consoles, PCs, VR headsets, and even mobile devices. While I enjoy playing new games these days, I do long for the retro gaming systems I had when I was a kid: the original Nintendo...
Incredible Demos
![Detect Vendor Prefix with JavaScript]()
Detect Vendor Prefix with JavaScript
Regardless of our position on vendor prefixes, we have to live with them and occasionally use them to make things work. These prefixes can be used in two formats: the CSS format (
-moz-, as in-moz-element) and the JS format (navigator.mozApps). The awesome X-Tag project has...![JavaScript Canvas Image Conversion]()
JavaScript Canvas Image Conversion
At last week's Mozilla WebDev Offsite, we all spent half of the last day hacking on our future Mozilla Marketplace app. One mobile app that recently got a lot of attention was Instagram, which sold to Facebook for the bat shit crazy price of one...
